Re: [PATCH 1/3] i2c: update i2c_trace_msg static key to modern api

[Peter Zijlstra]

On Sun, Mar 25, 2018 at 12:10:54PM -0700, Davidlohr Bueso wrote:
> @@ -1848,11 +1848,11 @@ int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
>  	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))
>  		return -EOPNOTSUPP;
>  
> -	/* i2c_trace_msg gets enabled when tracepoint i2c_transfer gets
> +	/* i2c_trace_msg_key gets enabled when tracepoint i2c_transfer gets
>  	 * enabled.  This is an efficient way of keeping the for-loop from
>  	 * being executed when not needed.
>  	 */
> -	if (static_key_false(&i2c_trace_msg)) {
> +	if (static_branch_unlikely(&i2c_trace_msg_key)) {

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